<template>
    <div class="type-nav">
        <div class="container">
            <div class="nav-left" @mouseleave="moveOut">
                <h2 class="all" @mouseenter="isShow = true">全部商品分类</h2>
                <transition name="sort">
                    <div class="sort" v-show="isShow">
                    <div class="all-sort-list2" @click="toSearch">
                        <div
                            class="item"
                            :class="{ item_on: currentIndex === index }"
                            v-for="(c1, index) in catrgoryList"
                            :key="c1.categoryId"
                            @mouseenter="moveIn(index)"
                        >
                            <h3>
                                <!-- <a href="javascript:;">{{ c1.categoryName }}</a> -->

                                <a
                                    href="javascript:;"
                                    :data-category1Id="c1.categoryId"
                                    :data-categoryName="c1.categoryName"
                                    >{{ c1.categoryName }}</a
                                >
                            </h3>
                            <div class="item-list clearfix">
                                <div class="subitem">
                                    <dl
                                        class="fore"
                                        v-for="c2 in c1.categoryChild"
                                        :key="c2.categoryId"
                                    >
                                        <dt>
                                            <!-- <a href="javascript:;">{{
                                                c2.categoryName
                                            }}</a> -->
                                            <a
                                                href="javascript:;"
                                                :data-category2Id="
                                                    c2.categoryId
                                                "
                                                :data-categoryName="
                                                    c2.categoryName
                                                "
                                                >{{ c2.categoryName }}</a
                                            >
                                        </dt>
                                        <dd>
                                            <em
                                                v-for="c3 in c2.categoryChild"
                                                :key="c3.categoryId"
                                            >
                                                <a
                                                    href="javascript:;"
                                                    :data-category3Id="
                                                        c3.categoryId
                                                    "
                                                    :data-categoryName="
                                                        c3.categoryName
                                                    "
                                                    >{{ c3.categoryName }}</a
                                                >
                                            </em>
                                            <em>
                                                <a href="">文学</a>
                                            </em>
                                            <em>
                                                <a href="">经管</a>
                                            </em>
                                            <em>
                                                <a href="">畅读VIP</a>
                                            </em>
                                        </dd>
                                    </dl>
                                </div>
                            </div>
                        </div>
                    </div>
                </div>
                </transition>
            </div>
            <nav class="nav">
                <a href="###">服装城</a>
                <a href="###">美妆馆</a>
                <a href="###">尚品汇超市</a>
                <a href="###">全球购</a>
                <a href="###">闪购</a>
                <a href="###">团购</a>
                <a href="###">有趣</a>
                <a href="###">秒杀</a>
            </nav>
        </div>
    </div>
</template>

<script>
import { mapActions, mapState } from "vuex";
import throttle from "lodash/throttle";

export default {
    name: "TypeNav",
    data() {
        return {
            currentIndex: -1,
            isShow: true,
        };
    },
    mounted() {
        // this.$store.dispatch("getCategoryList");
        if (this.$route.path != "/home") {
            this.isShow = false;
        }
    },
    methods: {
        // ...mapActions(["getCategoryList"]),
        //函数的节流 ,鼠标移入
        moveIn: throttle(
            function (index) {
                this.currentIndex = index;
            },
            50,
            { trailing: false }
        ),
        //鼠标移出
        moveOut() {
            this.currentIndex = -1;

            if (this.$route.path !== "/home") {
                this.isShow = false;
            }
        },
        toSearch(event) {
            //不是a标签就不做处理
            if (event.target.nodeName !== "A") {
                return
            }
            let { category1id, category2id, category3id, categoryname } =
                event.target.dataset;
            let query = {};
            category1id ? (query.category1Id = category1id) : "";
            category2id ? (query.category2Id = category2id) : "";
            category3id ? (query.category3Id = category3id) : "";
            query.categoryName = categoryname;

            let location = {
                name: "search",
                query,
            };

            if (this.$route.params) {
                location.params = this.$route.params;
            }

            this.$router.push(location);
        },
    },
    computed: {
        ...mapState({
            catrgoryList: (state) => state.home.categoryList,
        }),
    },
};
</script>

<style lang="less" scoped>
.type-nav {
    border-bottom: 2px solid #e1251b;

    .container {
        width: 1200px;
        margin: 0 auto;
        display: flex;
        position: relative;

        .all {
            width: 210px;
            height: 45px;
            background-color: #e1251b;
            line-height: 45px;
            text-align: center;
            color: #fff;
            font-size: 14px;
            font-weight: bold;
        }

        .nav {
            a {
                height: 45px;
                margin: 0 22px;
                line-height: 45px;
                font-size: 16px;
                color: #333;
            }
        }

        .sort {
            position: absolute;
            left: 0;
            top: 45px;
            width: 210px;
            height: 461px;
            position: absolute;
            background: orange;
            z-index: 999;

            .all-sort-list2 {
                .item {
                    h3 {
                        line-height: 30px;
                        font-size: 14px;
                        font-weight: 400;
                        overflow: hidden;
                        padding: 0 20px;
                        margin: 0;

                        a {
                            color: #333;
                        }
                    }

                    .item-list {
                        display: none;
                        position: absolute;
                        width: 734px;
                        min-height: 460px;
                        background: #f7f7f7;
                        left: 210px;
                        border: 1px solid #ddd;
                        top: 0;
                        z-index: 9999 !important;

                        .subitem {
                            float: left;
                            width: 650px;
                            padding: 0 4px 0 8px;

                            dl {
                                border-top: 1px solid #eee;
                                padding: 6px 0;
                                overflow: hidden;
                                zoom: 1;

                                &.fore {
                                    border-top: 0;
                                }

                                dt {
                                    float: left;
                                    width: 54px;
                                    line-height: 22px;
                                    text-align: right;
                                    padding: 3px 6px 0 0;
                                    font-weight: 700;
                                }

                                dd {
                                    float: left;
                                    width: 700px;
                                    padding: 3px 0 0;
                                    overflow: hidden;

                                    em {
                                        float: left;
                                        height: 14px;
                                        line-height: 14px;
                                        padding: 0 8px;
                                        margin-top: 5px;
                                        border-left: 1px solid #ccc;
                                    }
                                }
                            }
                        }
                    }

                    &.item_on {
                        background-color: skyblue;
                        .item-list {
                            display: block;
                        }
                    }
                }
            }
            
        }
        .sort-enter {
            height: 0;
            opacity: 0;
        }
        .sort-enter-to {
            height: 461px;
            opacity: 1;
        }
        .sort-enter-active {
            transition: all .5s;
        }
    }
}
</style>